I have a 64 Barracuda V8 Car.
So the V8 64 Cable is a lot longer for the shifter, why I don't know, I used a /6 and it works great. Park brake cable is about the same length.
Remember 65 cables may work but remember they where column and console shift, don't know if a console cable is long enough.
Imperial Services has gone out of business......
Google "TorqureFlite Pat" on Ebay, he does rebuild kits, cables everything for the early transmissions, He will even talk you through removing the cables over the phone.